Improved oil-proof cask



NITED STATES PATENT OFFICE.

GEORGE E. VAN DERBURGH, OF MAMARONEOK, NEW YORK.

IIVIPROVED OIL-PROOF CASK.

Specification forming part of Letters Patent No. 34,707. dated March 18,' 1862.

To all whom, it may concern:

Be it known that I, GEORGE E. VAN DER- BURGH, of Mamaroneck, in'the county of XVestchester and State of New York, have im' method of treatment by which I make the interior surfaces of Wooden vessels impervious to the action of oil, turpentine, and some other descriptions 'of fluids.

I ytake a cask, barrel, keg, irkin, or other style of wooden vessel and first pour into the same a quantity of liquid silicate of such a temperature and consistency that it will penetrate into the pores of the Wood, and immediately after pouring. the liquid silicate into the said vessel I subject the same to such a character of movements as will bring the liquid silicate placed therein into repeated contact with every portion of the interior surface of the vessel; and after this has been done I place the said vessel in such a position as willalloW the surplus liquid silicate contained therein to entirely drain out of the same. After this has been accomplished and the interior surface of the said vessel has become sufficiently dry and hard, it may be advisable in some cases to pour a second charge of liquid silicate into the said vessel, and after subjecting the same to the requisite movements then to place the said vessel in a proper position for allowing the surplus liquid silicate to drain out of the same and its interior surface to become dry and hard. The said coating, draining,

and drying processes may be repeated as many times as may be deemed advisable; ybut it is believed that in many cases a single coating process with a good quality of liquid silicate will be sufficient.

The accompanying drawing represen ts either a cask, a barrel, a keg, or a iirkin, the interior` surface of which has been'rendered impervious to oil, turpentine, Sac., by the use of a liquid 

